Steam-boiler construction.



J. FARMER & M. E. SHERLAND.

STEAM BOILER CONSTRUCTION.

APPLICATION FILED JUNE 16, I914.

1, 1 34, 1 1 5. Patented Apr. 6, 1915.

3 SHEETS-SHEBT 1- l l u THE NORRIS PETERS 60., PHOTO-LITHCL, WASHINGTON D. C,

J. FARMER & M. E. SHERLAND.

STEAM BOILER CONSTRUCTION.

APPLICATION FILED JUNE 16, 1914.

3 SHEETS-SHEET 2.

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J. FARMER & M. E. SHERLAND.

STEAM BOILER CONSTRUCTION.

APPLICATION FILED JUNE 16, 1914.

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THE NORRIS PETERS CO.. Prion-ulna, WASHINGTON, D. C

UNTTED STATES PATENT @FEEQE.

JOHN FARMER, 0F ARGENTA, AND MARK E. SHERLAND, OF IVIQGEHEE, ARKANSAS.

STEAM-BOILER, CONSTRUCTION.

Specification of Letters Eatent.

Patented Apr. 6, 1915.

Application filed June 16, 1914. Serial No. 845,368.

To all whom it may concern Be it known that we, JOHN FARMER and MARK E. SHERLAND, citizens of the United States of America, residing at, respectively, Argenta, county of Pulaski, State of Arkansas, and McGehee, county of Desha, and State of Arkansas, have invented certain new and useful Improvements in Steam- Boiler Construction, of which the following is a specification.

The present invention relates to improvements in steam boiler construction, and is especially adapted for use in connection with tubular steam boilers and preferably of a locomotive type.

The primary object of the invention is to improve and provide a novel construction at the front end of the steam boiler in the construction and arrangement of the front flue sheet, with the purpose or object in view of converting standard type locomotive for use with our invention, without encroaching upon the space usually alloted to the fire tubes, at comparatively inexpensive cost.

A further object of our invention is to simplify the construction of a locomotive boiler at the smoke box end thereof, by eliminating the steam pipes which lead to the cylinders, from the smoke box, and thus leaving the smoke box open and unobstructed for the clear passage of gases of combustion from the fire tubes to the stack.

The invention consists in certain novel features of construction and arrangements of parts as hereinafter described and more fully pointed out in the claims.

in the accompanying drawings we have illustrated one complete example, and several modified forms, of steam boilers constructed according to the best modes we have so far devised for the practical application of the principles of our invention, but it will be manifest that other colorable changes and alterations may be made in the shape and sizes of parts as shown in the drawings without departing from the spirit of our invention.

In the drawings: Figure 1 is a vertical longitudinal sectional. view of the waist of the boiler and smoke box portion of a locomotive or engine having our invention embodied therein. Fig. 2 is a transverse vertical sectional view taken through the smoke box of the locomotive. Fig. 3 is an enlarged detail vertical longitudinal sectional view of the boiler with the fire tubes showing the front flue sheet and its connections. Fig. i is a diagrammatical view showing a modified arrangement of the front flue sheet. Fig. 5 is another modification of the front flue sheet. Fig. 6 is a further modified form of the front flue sheet and its connections.

In the preferred embodiment of our invention as illustrated in the drawings we have utilized so much of a railroad steam locomotive of standard type as is necessary to illustrate our invention, and we have shown the waist portion 1 of a boiler having the usual steam dome 2, and the main steam pipe or dry pipe 3 located in the steamspace above the longitudinally arranged fire tubes 4 which tubes extend fromthe fire box (not shown) to the smoke box 5 of the engine, and are fixed in the front flue sheet 6 as usual. The smoke box is equipped with the usual stack 7, for receiving the gases of combustion as they pass from the fire tubes through the smoke box, and the exhaust steam nozzle 8 is utilized in conneotion with the draft pipes 9-9 to facilitate the exit of the gases of combustion. The cylinder saddles are indicated by the numeral 10, the steam pipes leading to the cylinders being indicated by the numbers 11.

The front flue sheet is of peculiar construction, and is constructed as follows. The flue sheet is provided with an annular flange or ring 12 which extends circumferentially around the interior of the boiler shell 1, and is secured thereto by bolts or rivets as usual. As clearly seen in Fig. 3, the flue sheet is formed with an offset portion or plate as indicated at 7, and this plate forms the connection between the flange 12 and the front fine sheet proper 6. The offsetting of this plate provides an open interior space 13 through which the ends of the fire tube project as they enter the front flue sheet 6, and the offset portion also forms an outer annular space 1% which is of uniform dimension throughout something more than two-thirds of the circumference of the boiler, and at the upper portion the size of the space is increased as at 15. This continuous space formed by the portions 14: and 15 is closed by means of a plate 16 which is formed with an annular flange 17 that is attached tonthe flange 12 of the flue sheet 6, and is cut out in the form or outline of the walls of the space 13, so that the up turned flange 18 of-this plate 16 may be riveted or bolted direct to the flanges of the plate 7 The steam pipe 3 is formed with a flange 19 which is riveted or bolted to the plate 7 and is passed through a perforation therein. In order to introduce the dry pipe or steam pipe 8 before securing it in position, a flanged cap 21 is provided'to fit in and be bolted to the flanges 22 which are struck-up from the plate 16 to form an" opening for the reception of this flange plate 21, which is bolted or riveted as shown.

The parts are of sheet metal as usual, and are stamped or struck-up in suitable 'man-. ner sothat they may be produced at a coinparativelyiinexpensive cost, and, of course,

all the joints are steam tight, and form steam tight spaces 1a and 15, intowhich the dry steam pipe 3 l'eads the steam from the steam dome2. v v 1 By means of the pivoted anchoring bolts or braces'23, which are riveted or bolted at 2a to the boiler, and at are attached to the'plate 7 the entire front flue sheet and -'its accessories are securely held inposition', and braced against strain or stress of the gases of combustion is provided for through I thesmoke box. These results are attained without sacrificing the area of steam heat-v ing surface, and the fire tubes are just as great in number as in the locomotives now in use. This structure in the front part of the boiler also braces and reinforces the 10- comotive, in that the presence of the ofi-set front flue sheet and the cover plates form an added reinforcement to brace the boiler. In the modification shown in Fig. 4,; the space 15 is retained, but there are provided a pair of legs ME -14c which extend therefrom and form passages to the steam pipes 11-1l.

In Fig. 5, the space 15 is retained, but this 7 space 15 is connected withthe reduced space 14 which isannular and extends approximately around the lower half of the boiler shell, by tubes 30-30, and by this arrangement there are provided two separate spaces 15 and 14 which are connected by the tubes 30 that are located in position to be heated by the passing gases of combustion.

In Fig. 6 a further modification is shown,

wherein the large space 15 is connected to the duplex reduced spaces 14 14= by tubes 3131, and in this instance we havetwo smaller super-heaters that are connected with the larger space 15 by tubes,.and the steam in all three instances is led to the cylinders through the steam pipes 11. V These modified forms of the invention are constructed alonglines similar to the construction of the front flue sheet shown in F igsl 1, 2, and 3, and are merely illustrative modifications of the structure of our front flue sheet, but it will be understood'that we contemplate using, and intend to use still further modifications, that are too numerous to illustrate, but which we intend to cover by the following claims. I

aving thus fully described ourrinvention, what we claimas new, and desire to secure by Letters Patent, isz.

1. The combination with a steam boiler, of a flanged flue sheethaving a central ofiset portion forming an'annular space there about, a plate closing said space,;the dry pipe communicating with said space, and

steam pipes .extendingfrom said spaces to supply thecylinders.

2. The combination'with a steam boiler,

of a front flue sheet having an off-set portion to receive the fire fines, and forming an annular space, a circumferential flange on the flue sheet bounding the outer area of said space, a flanged plate closing the space, a dry pipe communicatingwith the space, and steam pipes leading therefrom as described. V r r The combinationwith a steam boiler,

of a front flue sheet havingfin o I I tionto receive the fire fiues, and forming a steam space, an annular'flange on the flue closing the space, afdry pipe communicating with the space, steam pipes leading from said space, and braces connecting said flue sheet with the shell of the boiler.

sheet inclosing said space, a flanged plate 4. The combination with a boiler, of a front flue sheet having a wide'fiange, and

formed with an off-set projecting portion i for the fire flues, said projecting portion forming spaces between it and the wide flange of the sheet, a plate closing said space and said spaces adapted to receive dry steam from, the steam dome and having outlet steam pipes for the cylinders. r

5. The combination with a steam boiler,- vof a front flue sheet having an outer wide annular flange, an off-set portion, and a closing plate, said off-set portion forming an upper open space for entrance of steam, and

' also forming restrictedpassages extending therefrom around the flue shell, and said restricted passages having outlet steam pipes.

6. The combination with a steam boiler,

of a front flue sheet having a wide flange and an off-set portion forming therebetween steam spaces, a plate inclosing said space In testimony whereof We atfix our signaand attached to said Wide flange and off-set tures in presence of tWo Witnesses.

portion, a dry steam pipe communicating JOHN F ARMER.

With said steam space, outlet steam pipes, MARK E. SHERLAND. and an opening in said plate having a Witnesses:

flanged cap, to provide for the insertion of C. E. AVERY, Sn,

said dry steam pipe. W. D. DARBY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. 0. 

